Here's a list of 3 letter IATA airport codes, sorted by city name. Clicking on the code will show you the SeatSaleSpy.com list of airline seat sales to and from that airport, compiled from millions of searches on hundreds of travel and airline websites in the last few days. You can also see airline seat sale results between any two specific airports using the search forms to the right.

The airport codes are arranged alphabetically by city name. Click on the starting letter:

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N - O - P - Q - R - S - T - U - V - W - X - Y - Z

Airport Codes (Cities starting with O)

ODW - Oak Harbor, WA (Oak Harbor)
OAK - Oakland, CA (Oakland)
ODM - Oakland, MD (All airports)
OAX - Oaxaca, Mexico (Xoxocotlan)
OBO - Obihiro, Japan (Obihiro)
ONJ - Odate Noshiro, Japan (Odate Noshiro)
ODS - Odessa, Ukraine (Central)
OGS - Ogdensburg, NY (Ogdensburg)
OHD - Ohrid, Macedonia (Ohrid)
OIT - Oita, Japan (Oita)
OKJ - Okayama, Japan (Okayama)
OKA - Okinawa, Japan (Naha)
OKC - Oklahoma City, OK (Will Rogers World)
OLB - Olbia, Italy (Costa Smeralda)
YOC - Old Crow, YT, Canada (Old Crow)
OLH - Old Harbor, AK (Old Harbor SPB)
KOY - Olga Bay, AK (Olga Bay SPB)
OMA - Omaha, NE (Eppley Airfield)
OMS - Omsk, Russia (Omsk)
OND - Ondangwa, Namibia (Ondangwa)
ONL - Oneill, NE (Oneill)
VPE - Ongiva, Angola (Ongiva)
ONT - Ontario, CA (Ontario)
OMR - Oradea, Romania (Oradea)
ORN - Oran, Algeria (Es Senia)
OMD - Oranjemund, Namibia (Oranjemund)
ORB - Orebro, Sweden (Orebro-Bofors)
REN - Orenburg, Russia (Orenburg)
OLA - Orland, Norway (Orland)
ORL - Orlando, FL (All airports)
MCO - Orlando, FL (Orlando)
OMC - Ormoc, Philippines (Ormoc)
OER - Ornskoldsvik, Sweden (Ornskoldsvik)
OSW - Orsk, Russia (Orsk)
HOV - Orsta-Volda, Norway (Hovden)
OSA - Osaka, Japan (All airports)
ITM - Osaka, Japan (Itami)
KIX - Osaka, Japan (Kansai International)
OSS - Osh, Kyrgyzstan (Osh)
YOO - Oshawa, ON, Canada (Oshawa)
OIM - Oshima, Japan (Oshima)
OSI - Osijek, Croatia (Osijek)
OSK - Oskarshamn, Sweden (Oskarshamn)
OSL - Oslo, Norway (Oslo Airport)
TRF - Oslo, Norway (Sandefjord)
ZOS - Osorno, Chile (Canal Balo)
OSD - Ostersund, Sweden (Froesoe)
OSR - Ostrava, Czech Republic (Mosnov)
YND - Ottawa, ON, Canada (Gatineau)
YOW - Ottawa, ON, Canada (Ottawa)
OUA - Ouagadougou, Burkina Faso (Ouagadougou)
OFI - Ouango Fitini, Cote d'Ivoire (Ouango Fitini)
OGX - Ouargla, Algeria (Ain Beida)
OZZ - Ouarzazate, Morocco (Ouarzazate)
ODY - Oudomxay, Laos (Oudomxay)
OUE - Ouesso, Republic of the Congo (Ouesso)
OUD - Oujda, Morocco (Les Angades)
OUL - Oulu, Finland (Oulu)
OIA - Ourilandia, Brazil (Ourilandia)
KOZ - Ouzinkie, AK (Ouzinkie SPB)
VDA - Ovda, Israel (Ovda)
YOH - Oxford House, MB, Canada (Oxford House)
OXR - Oxnard/Ventura, CA (Oxnard/Ventura)
OYE - Oyem, Gabon (Oyem)
OZC - Ozamis City, Philippines (Labo)

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N - O - P - Q - R - S - T - U - V - W - X - Y - Z